William c



@uiten gisten atrat @ffice IMPROVEMENT IN STEAM GENERATOE'S.

dige tlgemle referrer in it ilgs tetttrt aiut mit making @ad nf tigttime.

Be it known that I, WILLIAM C. BAKER, of the city, county, and State ofNewYork, have invented certain new and useful Improvements in SteamBoilers, formed of zigzag pipes; and I do hereby declare and ascertainmy said improvements, referring to the accompanying drawing, which formsa part of my clescription'thereof.

Figure'l is a general view of the tubular boiler, with the case removed.Figure 2 the case in section. Figure 3 exterior view of the case. Myimprovements are made upon the boiler heretofore patented by me, and aredesigned to facilitate and improve the action thereof and economizefuel, besides giving greater capacity to the boiler and rendering it`more ecient, by substituting a water case for the brick one heretoforeemployed, which latter improvement renders the boiler useful for marineand other locomotive purposes. It is obvious that parts of thisinvention can be used without the rest, although I deem the boiler mosteiiicient by the employment of all the devices, where they can beconveniently.

The construction is as follows: The boiler consists of series ofstraight tubes,- the tubes in each series or range being placed oneabove another, and connected at their ends by castings, so as to form acontinuous zigzag conduit from the water chamber, a, up to the point, b,where it will be seen the en`d casting projects `somcwhat beyond thosebelow'. From this casting, 6, there` is a perpendicular pipe, c,connecting it with the water chamber, a, below. The casting is deepervertically than those below or aboveit, to give space for the separationof water from steam therein, the water descending through the pipe cbefore named, which thus keeps up the proper circulation of water in theboiler while the steam ascends through the tubes above to the steamchamber, d, above, where they terminate.` I have thus described onevertical range of tubes. The boiler is composed of any required numberof such ranges of tubes, each range being distinct from the others, butall connecting at the bottom with the water chamber a, and at the topwith the steam chamber s. The castings forming the end connectionsbetween the tubes ane of rectangular form on their exterior surface, andrest one upon another, as clearly indicated in the drawing. This form ofconstruction gives support and stability to the different parts of thestructure, while it allows free play for the expansion or contraction ofthe several parts. It will be noticed that the rst front castings of thesteam coil are furnished with lugs or projections, t, cast on their'under sides, that rest upon those below, thus raising them to theproper level of the enlarged lrear castings at b, and making adistinctly increased space between the water coil and the steam coilthat is above the water line in b. At about one-third the distance, moreor less, from the water cylinder a to' the front of the boiler there isa partition, p, which the tubes pass through, that forms a barrier tothe passage of the products of combustion rearward from the lirechamber, said re chamber occupying the whole space under the boilertubes in front of said partition p, whence the heat, Ste., from theburning' fuel is made to ascend to the tcp of the enclpsing chamber `orcase, and thence over the top of the partition down under the waterchamber a, and oif through the chimney at rv. This portion is veryimportant in economizing fuel, by properly distributing the heat and ingiving efficiency to the boiler by so distributing it as to aid thecirculation of water therein. Instead of the brick casing or chamber inwhich I enclosed my former boiler, I propose to substitute, especiallyfor movable boilers, a double metal oase, c?,

(see figs. 2 and 3,) having a water space, y, around the boiler chamber,which said metal case d incluses. By

this arrangement I utilize all the waste heat within the tire chamberand boiler space in heating the water in the Y case d, which I use asfeed water to the boiler, with which it is connected by -the pipeopening into the water space y, and thence leading through a feed pumpat f, to the water chamber a, or other convenient part of the boiler, bymeans of which I insure a hot-water supply thereto. To give the boilergreater capacity, I sometimes add a water chamber, g, thereto, outsidethe case d, (or otherwise.) 4.As clearly seen in the drawing, it may bein Aany convenient form and position, but must be constructed andarranged so as to connect with the boiler by a pipe, "t, below the waterline, and a pipe, e', above the water line, or some equivalents thereof,so that the pressure and circulation therein shall correspond with theboiler, with which it is connected. To this chamber gthe gauge-cock, le,may be ailixed, as seen in the drawing. In addition to the Steam chambers, there may be a second one, c', which is placed above and communicateswith said chamber c, by a pipe, Z. When the second chamber is used thesteam should be taken therefrom for use through a proper pipe. I connecta safety-valve, c, with these steam chambers, whence a pipe leads intothe metal case d, or there may beiseparate safety-valves foreach, andtheescope steam from the steam chambers may -be conducted by a pipefromthe safety-valve thereon to the water-jacket or space before named; ind. This water space y I intend to employ sometimes :1s a substitute fora Water tank. z is a blow-off cock attached to the case d, to blow Aofftherefrom when necessary.

Having thus fully described my improvements, what I claim therein, andfor which I desire to secure Letters Patent, is I 1. The partition p,dividing the front from the rear of the boiler, When-combined with atubular boiler, constructed as herein set forth, and directing the heatin its course between the tubes, as and for the purposes described.

2. I also claim the supplemental water chamber g, combined with thecirculating tubular-boiler, as specified.

3. I also claim the additional steam chamber c', connecting with thesteam chamber s, substantially as and for the purposes set forth above.

4. I also claim the connections or bends, which bear against and supporteach other vertically and laterally, by which the tubes are supported,as and for the purposes described. i

WM. C. BAKER.

Witnesses:

J. J. GREENOUGH, Moses M. ROBINSON.

